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Steyliff Grove is one of the dungeons in the game Final Fantasy XV.

A Menace Sleeps In Steyliff[]

Steyliff Grove Menace Dungeon Entrance Location

The broken wall that leads to the sealed door.

Starting in Chapter 15, the player has the opportunity to delve deeper into the main-game dungeons. To complete the A Menace Sleeps In Steyliff quest (as a part of the larger Menace Beneath Lucis quest line), the player must journey to Steyliff Grove. The Menace Dungeon entrance lies beyond the great hall at the bottom of Steyliff where the Quetzalcoatl spawns during the regular dungeon. There is a hole broken into the left side of the back wall that leads to the sealed door. There are 100 floors overall.

A word of caution to the dungeon delver that bears repeating - there is no ability to save while occupying any area of the game considered a dungeon, outside of Auto-Saves (which will activate at certain checkpoints, such as camping). Completing Menace Dungeons can take a considerably longer amount of time than is demanded of their normal dungeon counterparts, and Steyliff's is the deepest of the Menace Dungeons. It is advised to plan accordingly before beginning the journey.

Upon approaching the sealed door, one of two dialogues will play. If this is the player's first Menace Dungeon:

Prompto - This door here. Is it one of the seals?

Ignis - It seems highly likely.

Gladiolus - Well, we got the key. Do we use it?

Noctis can then use the Sealbreaker's Key on the lock. The large seal has a series of spinning parts that light up red Solheim-esque symbols before swinging inward.

Gladiolus - Hey, now! Finally making some headway.

Ignis - At last, we have broken the seal.

Prompto - Yeah, I don't think that means what you think it means.

Noctis - Means we have to go.

Prompto - I know that. Oh, in there?

If this is not the player's first Menace Dungeon, upon approaching the door:

Gladiolus - Another door. Who wants to see what's behind? I'm game if you are.

And after opening the door:

Prompto - Hey, it's open!

Noctis - Let's hit it!

The first of many sets of stairs awaits.

Floors 1-10[]

Floor Occupant Treasure
1 Havokfang (x4) lvl. 79 Rusted Bit
2 Imps (x6) lvl. 78 Iron Shavings
3 Havokfang (x4) lvl. 79 Chrome Bit
4 Havokfang (x2) lvl. 79 Oracle Ascension Coin
5 Psychomancer (x1) lvl. 82

May summon Skeletons (lvl. 62)

Mythril Shaft
6 Imps (x6) lvl. 78 Hi-Elixir
7 Imps (x6) lvl. 78 Rare Coin
8 Psychomancer (x1) lvl. 82 Megalixir
9 Psychomancer (x1) lvl. 82 Potion

On Floor 10, there is the opportunity to camp at Intellune Haven and collect a Hi-Elixir. The Royal Edition DLC adds the monoliths feature to the Menace Dungeons. Monoliths are small stone monuments upon which are carved the various stories behind the sealing of the dungeons. They are written in the form of poems, carved in white on a black stone slab, and are likely written by several authors (though the monoliths in Steyliff are undoubtedly written by the Oracle King). Each monolith is headed by the phrase "Whence comes the Night, let shine the Light." In this room waits the first of the nine Steyliff monoliths, and it reads:

O she so wise will take her shining trident in her hand

Then she shall rise to spread the word of peace across the land

And lest the world forget her efforts or the life she gave

Upon these monoliths her noble deeds I shall engrave

Incidental dialogue will activate after reading the poem for the first time:

Noctis - "Whence comes the Night, let shine the Light"...

Prompto - Translation?

Gladiolus - Pretty sure it's saying, "find the big, bad monster and take it down."

Ignis - I don't wholly disagree with your interpretation, but it lacks nuance. Perhaps seeking more inscriptions will help elucidate their meaning.

Floors 11-20[]

Floor Occupant Treasure
11 Ronin (x2) lvl. 80 Rusted Bit
12 Havokfang (x4) lvl. 79 Purified Salt
This floor has two optional rooms Western door: Potion

Eastern door: Celestriad

13 Psychomancer (x1) lvl. 82 Chrome Bit
14 Psychomancer (x1) lvl. 82 Legatus Bangle
15 Havokfang (x2) lvl. 79 Debased Coin
16 Ronin (x2) lvl. 80 Rare Coin
17 Havokfang (x3) lvl. 79 Hi-Potion
18 Psychomancer (x1) lvl. 82 Megalixir
19 Ronin (x4) lvl. 80 Mega-Potion

On Floor 20, there is the opportunity to camp at Tunlough Haven. This room has the second monolith and a Megalixir. The monolith reads:

The gods are fickle entities, capricious through and through

Those among us who receive their grace are numbered few

And while I was not blest with acumen or power divine

The gods bequeathed to me a greater gift: her hand in mine

Floors 21-30[]

Floor Occupant Treasure
21 Matcha Mousse (x4) lvl. 83 Iron Shavings
22 Ronin (x2) lvl. 80 Mythril Shaft
23 Matcha Mousse (x2) lvl. 83 Debased Silverpiece
24 Matcha Mousse (x4) lvl. 83 Oracle Ascension Coin
25 Psychomancer (x1) lvl. 82 Elixir
26 Ronin (x2) lvl. 80 Hi-Potion
This floor has two optional rooms Western door: Debased Coin

Eastern door: Emperor's Anklet

27 Psychomancer (x1) lvl. 82 Rare Coin
28 Matcha Mousse (x4) lvl. 83 Rare Coin
29 Tonberry (x4) lvl. 84 Balmung

On Floor 30, there is the opportunity to camp at Scorpure Haven. This room has the third monolith and a Hi-Elixir. The monolith reads:

The harbingers of darkness have descended 'pon our realm

Yet much unlike the former king who the vanguard did helm

I issue orders from the rear, a veritable "coward king"

'Tis the Messengers who fight—their praises we ought sing

Floors 31-40[]

Floor Occupant Treasure
31 Regaltrice (x4) lvl. 81 Rusted Bit
32 Killerwasp (x2) lvl. 76 Oracle Ascension Coin
33 Regaltrice (x4) lvl. 81 Iron Shavings
34 Killerwasp (x2) lvl. 76 Megalixir
35 Killerwasp (x3) lvl. 76 Chrome Bit
36 Ronin (x2) lvl. 80 Oracle Ascension Coin
37 Ronin (x4) lvl. 80 Debased Coin
38 Killerwasp (x2) lvl. 76 Potion
39 Regaltrice (x8) lvl. 81 Elixir

On Floor 40, there is the opportunity to camp at Courcaive Haven. This room has the fourth monolith and a Megalixir. The monolith reads:

The greatness of the Oracle was heretofore untold

Her power was unparalleled, her heart was made of gold

She healed the masses, sending words of kindness from her lips

The brilliant light with which she shone ne'er could be eclipsed

Floors 41-50[]

Floor Occupant Treasure
41 Royalisk (x1) lvl. 82 Rusted Bit
42 Matcha Mousse (x4) lvl. 83 Megalixir
43 Matcha Mousse (x2) lvl. 83 Chrome Bit
44 Tonberry (x2) lvl. 84 Debased Silverpiece
45 Royalisk (x1) lvl. 82 Mythril Shaft
46 Royalisk (x1) lvl. 82 Oracle Ascension Coin
47 Tonberry (x2) lvl. 84 Hi-Potion
48 Matcha Mousse (x4) lvl. 83 Anklet of the Gods
49 Tonberry (x2) lvl. 84 Iron Shavings

On Floor 50, there is the opportunity to camp at Terrecephe Haven. This room has the fifth monolith and a Megalixir. The monolith reads:

Upon receiving tidings of the expedition's fall

I realized our sole surviving bastion was the Wall

To suppress the menace and dispel the disarray

We set out for the shaded groves of Cleigne without delay

Floors 51-60[]

Floor Occupant Treasure
51 Kingatrice (x1) lvl. 83 Mythril Shaft
52 Killer Wasp (x2) lvl. 76 Elixir
53 Killer Wasp (x2) lvl. 76 Debased Banknote
54 Kingatrice (x1) lvl. 83 Oracle Ascension Coin
55 Tonberry (x2) lvl. 84 Mega-Potion
56 Tonberry (x4) lvl. 84 Platinum Ingot
57 Killer Wasp (x4) lvl. 76 Ether
58 Kingatrice (x1) lvl. 83 Hi-Potion
59 Wyvern (x4) lvl. 86 Aegis Shield

On Floor 60, there is the opportunity to camp at Essofax Haven. This room has the sixth monolith and a Megalixir. The monolith reads:

Our path to Risorath was paved with troubles all the way

The treacherous terrain beset the two of us by day

Upon the fall of night the lurking darkness showed its claws

Yet staff in hand she saved us both from death's e'er-looming jaws

Floors 61-70[]

Floor Occupant Treasure
61 Matcha Mousse (x4) lvl. 83 Chrome Bit
62 Psychomancer (x1) lvl. 82 Megalixir
This floor has two optional rooms Northern door: Potion

Eastern door: Robe of the Lord

63 Psychomancer (x1) lvl. 82 Mythril Shaft
64 Matcha Mousse (x4) lvl. 83 Oracle Ascension Coin
65 Matcha Mousse (x4) lvl. 83 Debased Silverpiece
66 Psychomancer (x1) lvl. 82 Hi-Elixir
67 Psychomancer (x1) lvl. 82 Debased Silverpiece
68 Matcha Mousse (x4) lvl. 83 Hi-Potion
69 Matcha Mousse (x4) lvl. 83 Elixir

On Floor 70, there is the opportunity to camp at Vanderport Haven. This room has the seventh monolith and a Megalixir. The monolith reads:

Like a ray of light piercing straight through darkness' heart

The trident that she wielded cut the daemon hordes apart

No matter what ferocious foe may wait within the glades

It shall be rent asunder, powerless before her blades

Floors 71-80[]

Floor Occupant Treasure
71 Dolce (x4) lvl. 72 Rare Coin
72 Mindflayer (x2) lvl. 75 Sky Gemstone
73 Custard (x2) lvl. 72 Debased Banknote
74 Custard (x4) lvl. 72 Megalixir
75 Mindflayer (x2) lvl. 75 Potion
76 Mindflayer (x2) lvl. 75 Oracle Ascension Coin
77 Dolce (x4) lvl. 72 Mega-Potion
78 Dolce (x4) lvl. 72 Hi-Potion
79 Custard (x4) lvl. 72 Elixir

On Floor 80, there is the opportunity to camp at Sprannagh Haven. This room has the eighth monolith and a Megalixir. The monolith reads:

The waters of the Vesperpool had turned a sea of fire

Smoky, swirling billows had enshrouded the mire

Searing bolts of lightning cracked downward from the skies

Yet 'twere not clouds but wings that soared before my very eyes.

*

Were our foe the Scourge of Stars, it could have been purified

Yet this menace was no daemon—that, we soon descried

The Oracle I loved was slain and with our flags she burned

Beleaguered and bereft, to the forest I returned.

Floors 81-90[]

Floor Occupant Treasure
81 Tonberry (x1) lvl. 84 Mega-Potion
82 Psychomancer (x1) lvl. 82 Oracle Ascension Coin
83 Psychomancer (x1) lvl. 82 Mega Phoenix
84 Tonberry (x2) lvl. 84 Hi-Elixir
85 Psychomancer (x1) lvl. 82 Ether
86 Tonberry (x2) lvl. 84 Sky Gemstone
87 Psychomancer (x1) lvl. 82 Mega Phoenix
88 Tonberry (x2) lvl. 84 Elixir
89 Master Tonberry (x1) lvl. 88 Mythril Ingot

On Floor 90, there is the opportunity to camp one last time at Hepplecamp Haven. This room has the ninth and final monolith and a Megalixir. The monolith reads:

With the rains that fall upon the earth and nurture life

Also come the bolts of lightning, couriers of strife

Though man can't curb the fearsome whims that rule the natural world

Against a beast, the white flag of defeat needn't be unfurled.

*

Looking to the Oracle for guidance in these trials

I realized we might defeat the menace with our wiles

First we draw the devil down and seal it in a cage

Then entrust its exorcism to the coming age

And 'til an heir arises to succeed the life she led

Her staff in hand, I shall become the Oracle in her stead.

Floors 91-100[]

Floor Occupant Treasure
91 Master Tonberry (x1) lvl. 88 Chrome Bit
92 Master Tonberry (x1) lvl. 88 Hi-Potion
93 Kingatrice (x1) lvl. 83 Mythril Shaft
94 Master Tonberry (x1) lvl. 88 Ether
95 Kingatrice (x1) lvl. 83 Rare Coin
96 Griffon (x1) lvl. 84 Oracle Ascension Coin
97 Kingatrice (x1) lvl. 83 Debased Banknote
98 Griffon (x1) lvl. 84 Ether
99 Kingatrice (x1) lvl. 83 Mega Phoenix
100 Mictlantecihuatl (x1) lvl. 90 Flayer

After defeating the boss on Floor 100, the player must open up the map and select "Return to Entrance" to exit the dungeon.

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